For any payment questions please contact:

For any vendor registration questions please contact:

Non-exhibiting vendors can cancel with a full refund up to seven (7) days before the start of the Symposium. Substitutions from the same company can be arranged without penalty. Please send an email to treasurer@aalso.org to initiate a cancellation or substitution.

Exhibiting Vendor Cancellation Policy:

Exhibiting vendors can cancel with a full refund up to forty-five (45) days before the start of the Symposium. Within forty-five days of the start of the Symposium, registration fees are non-refundable. Please send an email treasurer@aalso.org to initiate a cancellation.